Thermal spraying of silicon nitride coatings using highly accelerated precursor powder particles
✍ Scribed by Robert B. Heimann
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 922 KB
- Volume
- 205
- Category
- Article
- ISSN
- 0257-8972
No coin nor oath required. For personal study only.
✦ Synopsis
Highly accelerated powder particles obtained by low-frequency pulsed detonation spraying (LFPDS), highfrequency pulsed detonation spraying (HFPDS), and high-current pulsed plasma spraying (HCPPS) were applied with the aim to deposit dense protective silicon nitride coatings that adhere well to steel and nickel superalloy surfaces. The silicon nitride-based feedstock powders comprise α-silicon nitride with sintering additives such as alumina, yttria and minor amounts of aluminum nitride and/or silica and magnesia. Coatings were characterized by testing their critical wear path length, tensile adhesion strength, microindentation hardness, salt-spray corrosion and thermoshock resistances, and friction coefficient (pin-on-disk).